Proven and cost effective cable protection systems for Floating Offshore Wind

Greg Campbell-Smith, Sales and Business Development Director, First Subsea Ltd.
Today’s complex floating offshore wind projects demand optimum and cost-effective solutions that permit developers to reduce CAPEX and ultimately lower and provide competitive LCoE. Systems used in floating offshore O&G don’t always translate for use in floating wind. These traditional methods may be over complex, time consuming to install and in turn result in technology gaps. An example of this are O&G SURF protection systems which are more complex and problematic to install for FOWT. The paper will look at the specific challenges faced in, installation methodology, weather windows, diver-less installation, high number of installations and the need to perform these quickly. Consideration is also given for the need to disconnect cable protection systems when the WTG are returned to port for repair or decommissioning and the desire of the industry to develop 'break away' systems should the mooring systems fail. Using over 20 years knowledge and expertise gained from connection systems used on O&G flexible pipes flowlines, the presentation will take you through the development of a cable protection system, demonstrating why it is important to collaborate with developers, cable manufacturers and third parties to reduce offshore installation costs, improve cable life expectancy and lower H&S and project risks. The presentation finishes with a summary of examples where First Subsea cable protection systems have been supplied, looking how the design has changed from the initial floating offshore wind projects located in Fukushima Japan, namely the Mirai, Shimpuu, Hamakaze floating units including the Hitachi floating Offshore Sub-Station. Then we look at current designs used on Cobra’s Kincardine Phase I and II and finally looking at future solutions optimised for high volume offshore installation.